Global Patent Index - EP 0003633 A1

EP 0003633 A1 19790822 - A method of and an apparatus for a radiotelephone communications system.

Title (en)

A method of and an apparatus for a radiotelephone communications system.

Title (de)

Verfahren und Einrichtung für ein Sprechfunkverkehrssystem.

Title (fr)

Méthode et dispositif pour un système de communication radiotéléphonique.

Publication

EP 0003633 A1 19790822 (EN)

Application

EP 79300016 A 19790105

Priority

US 87695678 A 19780213

Abstract (en)

A telephone system for providing communications between mobile radiotelephones, portable radiotelephones and land-line telephones, includes a land-line telephone system including a land-line switching network (20) for providing communication paths for land-line telephones, and a mobile radiotelephone system (30, 40, 50 and 60) for providing communication paths for mobile and portable radiotelephones. The mobile radiotelephone system includes a digital switching network (40), base stations (60), and PCM analog-to-digital (A/ D) and digital-toanalog (D/A) converters (30) interposed between the base stations (60) and the digital switching network (40) and between the land-line switching network (20) and the digital switching network (40). Analog ports are interfaced by the PCM A/D and D/A converters (30) to incoming and outgoing serial bit streams coded according to pulse-code-modulation (PCM) techniques standardized for telecommunications systems by the International Telegraph and Telephone Consultative Committee (CCITT). The digital switching network (40) receives the incoming serial PCM bit streams and provides the outgoing serial PCM bit streams so that telephone calls are automatically routed between the calling and called parties in the telephone system. Supervisory signalling is detected from the incoming serial PCM bit streams and processed by a signal processing unit (50) to determine an ordering of time slots for the PCM channels for controlling the interchange of PCM channels from the incoming serial PCM bit streams to the outgoing PCM channels corresponding to the incoming supervisory signalling from incoming PCM channels is adapted to a pre-established format recognized by the corresponding outgoing PCM channels and multiplexed into the respective outgoing serial PCM bit streams.

IPC 1-7

H04Q 7/04; H04Q 11/04

IPC 8 full level

H04B 7/26 (2006.01); H04M 3/00 (2006.01); H04Q 7/22 (2006.01); H04Q 7/24 (2006.01); H04Q 7/26 (2006.01); H04Q 7/30 (2006.01); H04Q 7/38 (2006.01); H04Q 11/04 (2006.01); H04W 84/04 (2009.01)

CPC (source: EP)

H04Q 11/0407 (2013.01); H04W 84/042 (2013.01)

Citation (search report)

  • US 3898390 A 19750805 - WELLS JOEL D, et al
  • US 3663762 A 19720516 - AMOS EDWARD JOEL JR [US]
  • US 3118018 A 19640114 - CORNELL WARREN A, et al
  • US 3890469 A 19750617 - KELLY MICHAEL J, et al
  • FR 2315815 A1 19770121 - ERICSSON L M PTY LTD [AU]
  • US 3920921 A 19751118 - PITRODA SATYAN G, et al
  • IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, vol. VT-22, no. 4, November 1973, New York FLUHR et al., "Switching Plan for a cellular mobile telephone system", pages 197 to 202. * Page 201, right-hand column, lines 14 to 30 *
  • REVIEW OF THE ELECTRICAL COMMUNICATION LABORATORIES, vol. 25, nos, 11-12, November-December 1977, Tokyo IKEDA et al., "Land mobile telephone switching equipment", pages 1203 to 1214. * Pages 1204 to 1211, paragraphs 3 and 4 *
  • THE BELL SYSTEM TECHNICAL JOURNAL, vol. 56, no. 7, September 1977, New York BOYLE et al., "Transmission/ switching interfaces and tall terminal equipment", pages 1057 to 1097. * Pages 1057 to 1062; paragraphs I and II; page 1062, line 10 to page 1063, line 17; line 39 to page 1069, line 4; page 1070, line 25 to page 1072, line 13; page 1074, paragraph 3.4.1; page 1075, lines 1 to 3; page 1076, paragraph 4.1.1; page 1077, line 11 to page 1082, line 5 *
  • IEEE INTERNATIONAL SWITCHING SYMPOSIUM RECORD, June 6-9, 1972, New York ROSE, "PCM tandem switching field trial in the U.K.", pages 406 to 410. * Page 408, left-hand column, lines 1 to 13 *
  • IEEE TRANSACTIONS ON COMMUNICATION TECHNOLOGY", vol. COM-16, no. 6, December 1968, New York GALLAGHER "A digital PCM time-division switching system", pages 759 to 770. * Page 760, left-hand column, line 1 to page 764, right-hand column, last line; page 765, right-hand column, last paragraph to page 769, left-hand column, line 9 *

Designated contracting state (EPC)

DE FR GB NL SE

DOCDB simple family (publication)

EP 0003633 A1 19790822; EP 0003633 B1 19821208; EP 0003633 B2 19860521; AT 382058 B 19870112; AT A110379 A 19860515; AU 4401279 A 19790823; AU 525090 B2 19821021; BR 7900814 A 19790904; CA 1129056 A 19820803; DE 2964187 D1 19830113; IL 56382 A0 19790312; IL 56382 A 19810520; JP S54139305 A 19791029; JP S63165934 U 19881028

DOCDB simple family (application)

EP 79300016 A 19790105; AT 110379 A 19790213; AU 4401279 A 19790207; BR 7900814 A 19790209; CA 319784 A 19790117; DE 2964187 T 19790105; IL 5638279 A 19790105; JP 13086887 U 19870827; JP 1382579 A 19790208